linux-toradex.git/tools/gpio, branch v4.10

Merge branch 'kbuild' of git://git.kernel.org/pub/scm/linux/kernel/git/mmarek/kbuild

2016-12-18T00:24:13+00:00

Pull kbuild updates from Michal Marek:

 - prototypes for x86 asm-exported symbols (Adam Borowski) and a warning
   about missing CRCs (Nick Piggin)

 - asm-exports fix for LTO (Nicolas Pitre)

 - thin archives improvements (Nick Piggin)

 - linker script fix for CONFIG_LD_DEAD_CODE_DATA_ELIMINATION (Nick
   Piggin)

 - genksyms support for __builtin_va_list keyword

 - misc minor fixes

* 'kbuild' of git://git.kernel.org/pub/scm/linux/kernel/git/mmarek/kbuild:
  x86/kbuild: enable modversions for symbols exported from asm
  kbuild: fix scripts/adjust_autoksyms.sh* for the no modules case
  scripts/kallsyms: remove last remnants of --page-offset option
  make use of make variable CURDIR instead of calling pwd
  kbuild: cmd_export_list: tighten the sed script
  kbuild: minor improvement for thin archives build
  kbuild: modpost warn if export version crc is missing
  kbuild: keep data tables through dead code elimination
  kbuild: improve linker compatibility with lib-ksyms.o build
  genksyms: Regenerate parser
  kbuild/genksyms: handle va_list type
  kbuild: thin archives for multi-y targets
  kbuild: kallsyms allow 3-pass generation if symbols size has changed

make use of make variable CURDIR instead of calling pwd

2016-12-11T11:12:56+00:00

make already provides the current working directory in a variable, so make
use of it instead of forking a shell. Also replace usage of PWD by
CURDIR. PWD is provided by most shells, but not all, so this makes the
build system more robust.

Signed-off-by: Uwe Kleine-König 
Signed-off-by: Michal Marek

tools/gpio: re-work gpio hammer with gpio operations

2016-10-24T14:33:11+00:00

Signed-off-by: Bamvor Jian Zhang 
Signed-off-by: Linus Walleij

tools/gpio: add gpio basic opereations

2016-10-24T14:33:11+00:00

Add basic gpio operations. User could get/set gpio value for specific
line of gpiochip.

Reference "tools/gpio/gpio-hammer.c" or
"tools/testing/selftest/gpio/gpio-mockup-chardev.c" for how to use it.

Signed-off-by: Bamvor Jian Zhang 
Reviewed-by: Michael Welling 
Signed-off-by: Linus Walleij

tools/gpio: fix gpio-event-mon header comment

2016-08-08T07:50:22+00:00

Fixes: 97f69747d8b1 ('tools/gpio: add the gpio-event-mon tool')
Signed-off-by: Baruch Siach 
Signed-off-by: Linus Walleij

tools/gpio: add install section

2016-06-23T09:07:13+00:00

Allow user to call install target.

Signed-off-by: Andy Shevchenko 
Acked-by: Alexandre Courbot 
Tested-by: Alexandre Courbot 
Signed-off-by: Linus Walleij

tools/gpio: move to tools buildsystem

2016-06-23T09:07:13+00:00

There is a nice buildsystem dedicated for userspace tools in Linux kernel tree.
Switch gpio target to be built by it.

Signed-off-by: Andy Shevchenko 
Acked-by: Alexandre Courbot 
Tested-by: Alexandre Courbot 
Signed-off-by: Linus Walleij

tools/gpio: add the gpio-event-mon tool

2016-06-15T07:29:29+00:00

The gpio-event-mon is used from userspace as an example of how
to monitor GPIO line events. It will latch on to a certain
GPIO line on a certain gpiochip and print timestamped events
as they arrive.

Example output:
$ gpio-event-mon -n gpiochip2 -o 0 -r -f
Monitoring line 0 on gpiochip2
Initial line value: 1
GPIO EVENT 946685798487609863: falling edge
GPIO EVENT 946685798732482910: rising edge
GPIO EVENT 946685799115997314: falling edge
GPIO EVENT 946685799381469726: rising edge

Signed-off-by: Linus Walleij

tools/gpio: add the gpio-hammer tool

2016-06-15T07:29:04+00:00

The gpio-hammer is used from userspace as an example of how
to retrieve a GPIO handle for one or several GPIO lines and
hammer the outputs from low to high and back again. It will
pulse the selected lines once per second for a specified
number of times or indefinitely if no loop count is
supplied.

Example output:
$ gpio-hammer -n gpiochip0 -o5 -o6 -o7
Hammer lines [5, 6, 7] on gpiochip0, initial states: [1, 1, 1]
[-] [5: 0, 6: 0, 7: 0]

Tested-by: Michael Welling 
Signed-off-by: Linus Walleij

tools/gpio: Add missing initialization of device_name

2016-03-31T09:51:30+00:00

lsgpio.c: In function ‘main’:
lsgpio.c:166:7: warning: ‘device_name’ may be used uninitialized in this functio
n [-Wmaybe-uninitialized]
   ret = list_device(device_name);
       ^

Signed-off-by: Geert Uytterhoeven 
Signed-off-by: Linus Walleij